Qiyana: The empress of Ixaocan is on Pele's deepest hatred list, she deems her the leader, and thus the one responsible for her people and the annexing of her tribes land. To Pele, Qiyana is spoiled and in need of being shown the true Ixtali way, even if that requires kicking the smugness out of her.
Rengar: Pele has gotten into scuffles with the hunter before, the first time Rengar had nearly gashed her neck, leaving a sizable scar on the right side of her jaw. The second fight was traditional, Pele met the beast with a roar of her own, proceeding to fight him on mutual grounds. It was an even clash, Pele coming out barely victorious.
Nidalee & Neeko: The two are mutual friends of Pele, they both understand her cause but only wish to keep their own tribe safe, to abide by the laws of Ixoacan. Pele respects their decision, even though she disagrees, and occasionally joins them for hunts.
Zyra: Pele doesn't trust nor does she like the plant witch, however there is mutual understanding of elements between them, Pele's magma must burn parts of the forest down to allow the soot to be used as healthy fertilizer for Zyra's plants.
Ezreal: The blonde hair explorer boy once traversed Ixtali lands and jungles, in search of Ixaocan. What he found was Pele, and she showed him the Vulcaon ruins of where they would worship Vulcao, the volcano native to Ixtal. She allowed him to camp on the grounds after the history lesson of her people, then saw him off away from Ixaocan.
Other elementalist (Janna, Taliyah, Lux, Brand, etc.): Pele would happily have anyone with any form of elemental powers come to join her uprising, the coup in place for when she has enough power to take everything. Specifically in Taliyah's case she may not, due to her younger age, but Pele would see her much like a younger sibling.